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골아세포가 배양된 치과 임플란트용 Ti-Ta합금의 전기화학적 특성
김원기(W.G. Kim),최한철(H.C. Choe),고영무(Y.M. Ko) 한국표면공학회 2008 한국표면공학회지 Vol.41 No.2
Electrochemical behaviors of surface modified and MC3T3-El cell cultured Ti-30Ta alloys have been investigated using various electrochemical methods. The Ti alloys containing Ta were melted by using a vacuum furnace and then homogenized for 6 hrs at 1000℃. MC3T3-El cell culture was performed with MC3T3-El mouse osteoblasts for 2 days. The microstructures and corrosion resistance were measured using FE-SEM, XRD, EIS and potentiodynamic test in artificial saliva solution at 36.5±1℃. Ti-Ta alloy showed the martensite structure of α+β phase and micro-structure was changed from lamellar structure to needle-like structure as Ta content increased. Corrosion resistance increased as Ta content increased. Corrosion resistance of cell cultured Ti- Ta alloy increased predominantly in compared with non cell cultured Ti- Ta alloy due to inhibition of the dissolution of metal ion by covered cell. RP value of MC3T3-El cell cultured Ti-40 Ta alloy showed 1.60×10? Ω㎠ which was higher than those of other Ti alloy. Polarization resistance of cell-cultured Ti-Ta alloy increased in compared with non-cell cultured Ti alloy.